MCP server · Phos Labs

Phos Labs Commerce Intelligence

Phos Labs ships a hosted, remote MCP server on mcp.phoslabs.io and lists it twice in the official MCP registry: io.phoslabs/commerce-intelligence (4.0.0, streamable-http, remote url https://mcp.phoslabs.io/, published 2026-03-08) and io.phoslabs/behavioral-science (1.0.0, sse, remote url https://mcp.phoslabs.io/sse, published 2026-03-29). Three paths answer on the host and they are gated differently: POST /mcp is the full Streamable HTTP endpoint behind OAuth 2.1 (401 invalid_token with an RFC 9728 resource_metadata challenge; RFC 8414 metadata advertises PKCE, refresh tokens and dynamic client registration); POST / answers an anonymous MCP initialize (protocolVersion 2025-03-26, capabilities.tools, serverInfo "Phos Labs Commerce Intelligence" 1.0.0) and then rejects every other method — tools/list, ping, prompts/list, resources/list, tools/call, notifications/initialized — with 401 {"error":"use /mcp for full MCP access"}; GET/POST /sse and /messages want an API-key bearer ("API key required. Pass Authorization: Bearer header."). tools/list could therefore not be introspected anonymously, so no inputSchema is recorded here: the tool inventory below is what the provider publishes elsewhere (the nine A2A card skills, the REST /api/v1/tools listing and the provider's own README), named as such. Billing is per tool call in credits (1 credit = EUR 0.01; agents start with free credits; packs at https://phoslabs.io/credits), and the provider states x402 USDC micropayments on Base L2 as an alternative rail.

Open endpoint → Phos Labs provider profile

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Provider: Phos Labs Type: Hosted endpoint Transport: streamable-http Host: mcp.phoslabs.io

Endpoint

https://mcp.phoslabs.io/mcp

Hosted endpoint · transport streamable-http

Connect

This is a remote MCP server — point an MCP client at the endpoint URL. Clients with native remote support (Claude, Cursor, VS Code, …):

# mcp client config (e.g. .mcp.json / mcp settings) { "mcpServers": { "phoslabs-io": { "url": "https://mcp.phoslabs.io/mcp" } } }

For stdio-only clients (older Claude Desktop, etc.), bridge with mcp-remote:

# Add to claude_desktop_config.json { "mcpServers": { "phoslabs-io": { "command": "npx", "args": ["-y", "mcp-remote", "https://mcp.phoslabs.io/mcp"] } } }

If the server requires authentication, add the provider's token/header (e.g. an X-API-Key) per its docs. A quick reachability check:

curl -i -X POST https://mcp.phoslabs.io/mcp \ -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Tools

audit — Full behavioral audit of a product or service
diagnose — Diagnose funnel dropoff with behavioral science
fix-checkout — Redesign a checkout flow using behavioral science
copy — Rewrite copy using behavioral science principles
pricing — Optimize pricing strategy with behavioral science
detect-biases — Detect cognitive biases in text
predict-churn — Identify which customers are about to leave and why. Returns churn risk scores with behavioral drivers and retention interventions.
personalize-approach — Segment customers by decision-making style and recommend tailored approaches for each segment.
add-social-proof — Design social proof elements — what others bought, reviews, peer behavior signals.
run-experiment — Design a rigorous A/B test with sample size calculations, metrics, treatment arms, and statistical power analysis.
ethics-check — Audit a design, intervention, or recommendation for dark patterns, manipulation, and autonomy violations.

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The Model Context Protocol (MCP) is an open protocol Anthropic introduced for connecting LLM-based agents to external tools and data sources. Providers publish MCP servers that expose their API surface as structured, discoverable tools — an MCP-compatible client (Claude Desktop, Cursor, Cline, Continue, etc.) can connect to the server and call its tools without any per-provider integration code.

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